Spring shade-roller



(No Model.) 2 Sheets-Shet 1.' S. HARTSHORN.

SPRING SHADE ROLLER. No. 328,216. I Patented Oct. 13, 1885.

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(No Model.) 2 SheetS-PShe etZ.

S. HARTSHORN.

SPRING SHADE ROLLER.

No. 328,216. Patented Oct. 13, 1885.

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N PETERS, Photo-lithograph, Wmmmm n. c

UNITED STATES PAT NT OFFICE.

STElVART HARTSHORN, OF MILLBURN, NEW JERSEY.

SPRING SHADE-ROLLER.

ILLECIFICATION forming part of Letters Patent No. 328,216, dated October13,1885.

Application filed August 20, 1854. Serial No. 141,077. (No model.)

To It whom it may concern:

Be it known that I, STEWART HARTSHORN, residing in Millburn, in thecounty of Essex and State of New Jersey, have invented certain new anduseful Improvements in Spring Shade-Rollers, of which the following is afull, clear, and exact description, reference being bad to theaccompanying, drawings, making a part of this specification.

My improvements refer to the spindle or shaft which carries the spring,and to securing the outer end of the spring to the disk or end plate,and the latter to the roller.

In the drawings illustrating my improvements, in which like lettersindicate like parts, Figure 1 is a view of my improved spindle. Fig. 2is a view of the spindle, showing the manner of attaching the end plateto the same. Fig. 3 is a view of my improved spindle when applied to aroller in which the inner end of the spring is connected with theroller. Fig. 4c is a view of a spindle having a ring or collar on theinner end.

My invention consists in combining or arranging with the shaft orspindle, at the end where the spring is attached to the revolvingroller, a long ferrule or shell of metal, of a diameter adapted to thediameter of the coil of the spring mounted upon the same, and extendingabout one third or half the length of the coiled spring. As one end ofthe spring is attached to the spindle, and therefore remains stationary,as the roller revolves the spring is wound up or coiled only at the endwhich is fastened to the revolving roller, and as the spring when woundup binds around the spindle, it follows that it will thus touch and comein contact with the latter at and near the end at which it begins tocoil. If the diameter of the spindle is much less than the diameter ofthe coiled spring as it comes from the mandrel, the spring is liable tobreak or be injured before it touches the spindle. The diameter of theshaft or spindle, therefore, at the end where the spring comes incontact with the same must be large enough to prevent the springbreaking or being injured as it is wound up or tightened; and as thespring will come in contact with the spindle only at the one end thisdiameter need not extend throughout the entire length of the spindle, orfor the whole length of the spring, but only so far as will suffice tosecure the results desired, and the remainder of the spindle may be muchsmaller in diameter.

By my improved method of construction I surround that end ofthe spindlewhich is at the end of the spring which connects with the roller with aferrule or shell of metal, of a diameter large enough to prevent thespring breaking or being injured, and of sufficient length to take andbear the contractions of the coils produced by the ordinary operationsof the roller, by which I am enabled to make the remainder of thespindle smaller, and consequentl y of less weight, which is a greatadvantage when the spindle is constructed of metal.

My improved construction, as applied to a metal spindle, is shown inFigs. 1 and 2. As is there seen, the spindle B B is formed of a smalllight wire, and the ferrule or shell A, made preferably of thin brass,is firmly attached to the same. I am thus enabled to use a metalspindle,and have the weight no greater than when a wooden spindle isused, and yet have the diameter of the spindle at the point desiredlarge enough to prevent the spring from being injured in tightening.

The spring may be attached to the spindle at either end, theferruleAbeing placed at the opposite end. Fig. 8 shows the springattached to the roller by its inner end, and to the spindle by its otheror outer end, the ferrule A being placed on the inner end of thespindle,where the spring is liable to come in contact with the latter.

The spindle B B may be made of a single piece of wire, adapted at oneend to engage with the bracket and at the other to hold the end of thespring, and having the ferrule A secured at one end, as beforedescribed; or the spindle may be in two portions, B and B, connectedtogether by the ferrule A.

The disk or end plate, P, may be connected with the spindle by anymethod now used; but I prefer the mode shown in Figs. 1 and 2. As isthere seen,the outer bracket end of the spindle is formed with ascrew-thread. The disk or end plate, P, having been placed on the end ofthe spindle, so as to rest against the ferrule A, a nut, C, is screwedonto the end of the spindle and against the end plate, whereby thelatter is held securely in place. This nut C may form the ratchet, orits equivalent, with which the pawls engage, as is shown in Figs. 1 and2 of the drawings. This nut, or its equivalent, may be fastened to theshaft in any convenient manner, as by riveting.

The spindle, when of metal, can be made in one piece from ordinary steelwire of uniform diameter, without milling and without other manipulationthan flattening the bracket end and connecting the end plate thereto.

When applied to awooden spindle, as shown in Fig. 4, the metal ferruleor shell A insures a smooth hard surface where the spring comes incontact with the spindle and prevents the coil of the spring sinking orgrinding into the wood.

When the inner end of the spring is attached to the inner end of thespindle, the outer end may be secured to the roller, or to the end plateor disk, in any way desired.

The inner end of the spindle may be provided with a ring or collar, asshown at E. Fig. 4, by which. when the inner bearing of the spindlewithin the rolleris dispensed with, the spring is not allowed to touchor come in contact with the walls of the cavity. This ring or. collar Bmay also serve to secure the spring within the slot in the end of thespindle.

I am aware that spindles have been made and used of differing orvaryingdiameters, and I do not therefore claim, broadl-y,such construction.

What I claim is 1. In spring shade-rollers, a spindle carrying a coiledspring attached thereto, having at its end adjacent to that part of theroller at which the spring is connected thereto, and around which thefirst contractions take place, an inclosing metallic ferrule or shell ofenlarged metallic diameter,extending only a part of the length of thespring, but sufficient to receive the first or principal contractionsthereof, substantially as and for the purposes set forth.

2. In spring shade-rollers, the combination, with the spindle having anouter end adapted to engage with the bracket, so as not to re volve, ofthe disk or end plate carrying the pawl, and a nut or collar forming thepawlratchet, surrounding the spindle for securing the disk or end platethereto, as and for the purposes set forth.

3. In spring shade-rollers, the combination, with the spindle B B,having at one end a ferrule or enlargement of greater diameter,substantiallyas described, and the outer end provided with thescrew-thread, of the disk or end plate, I", and screw ratchet-nut (hallconstructed substantially as described, and for the purposes set forth.

STEVAR-T HARTS HORN.

WVitnesses:

GEO. E. Onosour, E. T. VVHITE.

